Finding the Fourth Proportional to 622,196.73, 858,695.99 and 380,640.15

Step by Step Solution

1. Step 1: Write the proportion equation
   622,196.73 : 858,695.99 = 380,640.15 : x
2. Step 2: Convert to fraction form
   622,196.73/858,695.99 = 380,640.15/x
3. Step 3: Cross multiply
   622,196.73x = 858,695.99 × 380,640.15
4. Step 4: Simplify right side
   622,196.73x = 326,854,168,534.80
5. Step 5: Solve for x
   x = 326,854,168,534.80/622,196.73
6. Step 6: Final answer
   x = 525,322.86